Can't connect to SQL server

NEED HELP~!
I want to create a openfiledialog and allow user to choose which exel file to be imported into the server but this error keep coming "ODBC--connection to '{SQL Server}'TGT102 failed".
Thank you so much~~
PS. I am just a beginner of vb.net. So would u pls tell me the solution in detail?
THANKS~~~!!